集中
1
concentration (on a task);focusing one's attention
私は読書に集中していた。
I was concentrating on reading.
2
concentration (of population, buildings, power, etc.);centralization;convergence;focus (of a debate, questions, etc.)
彼の仕事の大半が都市部に集中している。
The bulk of his work is in the urban area.
3
within a collection of works